Piston-packing.



C. H. MILES.

PISTON PACKING.

APPLICATION FILED ocT. 5. I915- RENEWED NOV. 10.19I1.

1,260,009. V Patented Mar. 19, 1918.

UNITED STATES PATENT OFFICE.-

CHABLES MILES, OF CHICAGO, ILLINOIS.

PISTON-PACKING.

Application filed October 5, 1915, Serial No. 54,118.

To all whom it may concern:

Be it known that I, CHARLES H. MILES, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Piston-Packing, of which the following is a specification.

My invention relates to piston packing for internal combustion engine or steam pistons, and the object is to provide perfect expansible packing rings for pistons so that there can be no leaking of steam or of explosive force past the pistons and to provide continuous packing surfaces on the bottom and top edges and on the peripheries of the packing rings and thus close all possible places against the passage of steam of explosive force. Other objects are to provide a packing ring which will be unitary in action, that is, which will operate as a single packing ring, for mounting andadjusting purposes but which is provided with expansible members. Other objects and ad-.

vantages will befully explained in the following description and the invention will be more particularly pointed out in the claims.

Reference is had to the accompanyingv drawings which form a part of this appli cation.

Figure 1 is a perspective view of a packing ring assembled, being constructed as of one-piece of metal. Fig. 2 is a similar view of the same inverted. Fig. 3 is a diametrical section taken on the line H of Fig. 1. Fig. 4 is a diametrical section, taken on the line y-yof Fig. 1. Fig. 5 is a diametrical section, taken on the line z-z of Fig. 1. Fig. 6,is a perspective view of the central member of the packing ring without the cooperative expansion members. Fig. 7 is a perspective view of one of the detached expansible members.

Similar characters of reference are used to indicate the same parts throughout the several views.

The improved packing ring is provided with a central member 1 which is an open ring, but provided with a lapped or stepped joint 2 so that this member can expand with out breaking the continuous peripheral 'surface. Expansible members 4 and 3 .are

. formed on the outside of the member 1 and constitute the packing members. The members 1, 3, and '4 may be formed separately, as shown in Figs. 6 and 7, and then made rigid with each other for approx mately Specification of Letters Patent.

Patented Mar. 19, 1918.

Renewed November 10, 1917. Serial No. 201,406.

two thirds of the circle and this rigid part I around to the right to the end of member 3,

asshown in Fig. 1. This will strengthen part 5 of member 1. The expansion member 4 is attached to the part 6 of joint 2 and to the part 1 on around to the left in Fig. 2 to the end of member 4. This will strengthen. part 6 of member 1. Thus each expansion member 3 and 4 is rigid with the inner expansion member 1 for approxi mately two thirds of the circle and both members 3 and 4 are rigid with the partof the member 1, as shown in Fig. 1. This strengthens the. member 1 at that portion of member 1 which is opposite the joint 2. The inner member 1 may be made of steel, as the periphery of this member'never comes in contact with the piston cylinder, but the members 3 and 4 should be made of grayiron. The packing ring can be made much stronger and more durable by making the inner member of spring steel and the ring will be more resilient.

With the construction shown, there 1s a continuous pressure surface on the periphery of the packing ring, a continuous pressure surface on the bottom edge and a continuous pressure surface on thetop edge of the ring, other element can pass at any pomt of the piston packing. The joints between the members are preferably ground oints so that there can be no leaking. ,There is thus a double check against the passage of any element through the packing or behind the packing. When a piston goes down, there is a tendency to create a vacuum along the wall of the groove and oil would run in and pass behind the packing. But w1th a dot}- ble check, as, described, the 011 cannot cs cape from above the packing becausev there is a'continuous pressure surface against the upper wall of the groove in the piston. It will beunderstood that the top ed e of the member 1 and the top edge of nfcm er 3 are flush with each other and that the bottom edge of member 1 and the bottom edge of member 4 are flush with each other.

The members 3 and 4 may be of the same material as the member 1 and be made mso that no oil, or steam, gas, or

' tegral therewith, as shown by the full line said joint and each expansible member having one end free for approximately one third of the circle and the expansible members forming a continuous peripheral pressure surface.

2. A packing ring having a spring body ring member provided with an opening closed by a lapped joint and open expansible ring members formed on the periphery 'ofsaid body member and bridging said joint and each expansible member having one end free for approximately one third of the circle and the free portio n of one expansible -member being diametrically opposite the free portion of the other expansible member and the expansible members forming a continuous peripheral pressure surface of the packing ring.

3. A packing ring having an expansible body ring member provided with an opening closed by a lapped joint and open expansible ring members bridging said joint and extending in opposite directions from said joint and brazed to the periphery of said body member for approximately two thirds of the circle and having the unbrazed portions thereof diametrically opposite each other and said expansible members forming a continuous peripheral packing surface.

4. A packing ring having an expansible body member provided with an opening closed by a lapped joint and open expansible members bridging said joint and brazed to the periphery of said body member, one

expansible member being-brazed to one. member of said lappedjoint forfapproximately two thirds of the circle and each open expansible member having a free end approximately one third of the circle.

5. A packing ring having an open expansible inner ring member, and outer expansible ring members bridging the opening in said inner member and brazed to said inner member for approximately two thirds of the circle and having free ends diametrically opposite each other, one expansible member extending from the upper part of said ,joint free in one direction and the other expansible member extending from the lower part V of said joint free in the other direction.

6. A packing ring having an inner open expansible ring member, and outer open expansible ring members bridging the opening in said inner member and extending in opposite directions from said joint and brazed to the periphery of the inner member for approximately two-thirds of the circle, said outer members having portions thereof free from said inner member and the free portion of one outer member being diametrically opposite the free portion of the other outer member.

7. A packing ring having an inner open spring steel ring member, and outer open expansible ring membersof gray iron bridging the opening of saidinner member and brazed to the periphery of said inner member and extending free in opposite directions from said opening and forming continuous packing surfaces on the edges and on the periphery of the packing ring. 1

In testimony whereof, I set my handthis 12th day of July, 1915.

CHARLES H. MILES. 

